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Application of modern technologies for production of complex shape surfaces
Varhaník, Matúš ; Sadílek, Marek (referee) ; Drbúl,, Mário (referee) ; Sedlák, Josef (advisor)
A set of modern production technologies was applied in the design and production of the individualized femoral component of the total knee endoprosthesis. Before starting the design of the implant itself, the Ti6Al4V material produced by SLM 3D printing technology was tested in terms of tribological contact with the articulation member made of high molecular weight polyethylene. The obtained results confirmed the possibility of using this technology for the production of the semi-finished product of the intended implant. Another series of tests gradually defined the characteristics of the technological-production process in terms of the direction of printing, heat treatment, the method of processing the functional surface and the morphology of the surface. The deposition of coatings using PVD technology was aimed at increasing the functional properties of the implant, such as antibacterial properties, reducing friction and increasing wear resistance. Coatings testing in the categories of topography, adhesion, cohesion, delamination and coefficient of friction successively generated a winner from among the 3 tested coatings (TiN, WZrB, TiCC). The final part of the dissertation frames the acquired knowledge and transfers it to the pre-production and production phase of the creation of the femoral component of the total knee endoprosthesis. During this phase, knowledge from the field of reverse engineering, construction and chip machining technology is applied. The output of the work is an implant, the production of which included the use of a total of 4 reverse engineering software solutions, CAD/CAM support, CNC milling of general surfaces, polishing of the functional part and PVD coating.
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Design of PET bottle recyclation device for creation of 3D printing filament
Huplík, Ondřej ; Kolomý, Štěpán (referee) ; Sedlák, Josef (advisor)
The rise in popularity of 3D printing and the increasing amount of plastic waste are putting an emphasis on finding new sustainable and environmentally friendly solutions. This thesis addresses the issue of recycling plastic materials and how PET plastic can be used in 3D printing. The theoretical part describes the current possibilities of plastic recycling. The practical part focuses on the design of a device that accepts a PET bottle strip and converts it into filament by bringing it above the glass transition temperature. The device is designed with cost and compactness in mind. The device can be further improved and adapted for different types of plastic materials.
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Testing of sintered carbide cutting tools during high feed milling
Frank, Ondřej ; Vítek, Jiří (referee) ; Sedlák, Josef (advisor)
The aim of this thesis is to compare high feed milling tools from Dormer Pramet, s.r.o., which will use these results to complete the development process of a new family of tools. The tools were compared in terms of axial runout, chip evacuation and chip forming, temperature ratios and temperatures at the cutting area, roughness of machined surfaces and machine spindle loading, machining vibration levels and VBD cutting edge durability. The tests were carried out on the machined material X37CrMoV5-1 in two states, a soft state with a hardness of about 300 HB and a hardened state with a hardness of about 54 HRC. The thesis also includes a theoretical section dealing with high feed milling technology, tool wear and a description of the tested tools. The results obtained are summarized at the end of the thesis in a techno-economic evaluation.
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Preparation and design of the production of bevel gears using the Reverse engineering method
Šimáček, Daniel ; Sedlák, Josef (referee) ; Slaný, Martin (advisor)
This thesis addresses the reverse engineering of the assigned gears. The first part is dedicated to a theoretical review of the issues related to bevel gears, strength calculations of the gearing and defects that can occur during operation. This is followed by the production of bevel gears with helical teeth and the most common heat treatment of gears. The second part emphasizes the actual process of reverse engineering, describing the digitization of gears and their conversion into a solid body in CAD software. After obtaining the key dimensions of the gear set, an analytical calculation of the load capacity in contact and bending is performed, accompanied by a numerical calculation using the finite element method to determine the bending stress at the tooth root. Dimension verification is conducted through dimensional analysis in specialized software to potentially reveal deviations and inaccuracies in construction based on 3D scanning. The final part deals with the design of the technological process for the production of gears, followed by a technical-economic assessment of the preparation and actual production of the gears. The drawing documentation was created based on the 3D volumetric models generated from the scanned gears
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Design of technological equipment for remediation of wood infested by a bark beetle
Němec, Tomáš ; Osička, Karel (referee) ; Sedlák, Josef (advisor)
This bachelor thesis focuses on the design of technological equipment for the sanitation of wood infested by the spruce bark beetle. The main idea of the proposed technology is the combination of harvester logging with chemical sanitation using spraying. This innovative approach allows for increased sanitation efficiency and reduced costs compared to traditional methods such as manual debarking or using backpack sprayers. The results show that the harvester ensures uniform coverage of insecticide on each felled tree, thereby minimizing the risk of inadequate sanitation. The proposed technology also reduces the number of workers needed for sanitation, which contributes to further cost savings and increases the overall efficiency of the process. The thesis further addresses the technical aspects of the proposed equipment, including a detailed description of individual components such as nozzles, pumps, tanks, and control systems. Testing of the prototype demonstrated its high efficiency and reliability under various working conditions. In addition to technical benefits, the thesis also highlights the ecological advantages of the proposed solution, which minimizes negative impacts on the environment through precise dosing of chemicals and reduced need for manual handling of infested wood. Overall, it can be concluded that the proposed solution is not only economically advantageous but also technically and ecologically beneficial, and it should significantly contribute to the protection of Czech forests from the bark beetle calamity.
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Football Recycling
Raabová, Viktorie ; Jemelka, Vojtěch (referee) ; Sedlák, Jaroslav (advisor)
In the centre of the city, near Lužánky, there is a strange brownfield that represents an interesting mix of past and present. This place has been the target of many plans and visions, but their fate has been different. Some have come to fruition, others have remained on paper, waiting for their chance. Different people have been involved in the creation of this complex space, coming and going over time, creating a distinct entity with many faces. Here you will find a luxury hotel, abandoned sports venues from the past and tennis courts still attracting sports enthusiasts. All this is complemented by a vast car park that seems to be a kind of inhospitable oasis in the middle of the city's concrete. But behind this urban kaleidoscope lies Planýrka, a special piece of nature in the heart of the city. Only the beaten paths and untrodden greenery here testify to a life that takes place beyond the reach of human hands, a life according to its own rules.
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Football Recycling
Kokošková, Dorotea ; Sládeček, Svatopluk (referee) ; Sedlák, Jaroslav (advisor)
The area in question is located near the city center and has significant historical importance as the main territory of Brno football and hockey. However, in its current state, it is almost inaccessible to pedestrians due to fragmentation and being cut off from the surrounding urban structure. The project aims to create paths and sidewalks for runners, pedestrians, and cyclists, which will improve accessibility and movement in the area. At the same time, it will expand Lužánky Park as a popular place for recreation. The project works with existing fragments of past plans and takes into account spatial and historical facts. The proposed changes include solutions to urban and architectural aspects, as well as new sports facilities that will support the diversity and multifunctionality of the area.
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Football Recycling
Vlček, Filip ; Jemelka, Vojtěch (referee) ; Sedlák, Jaroslav (advisor)
The former Brno stadium Za Lužánkami, located on the border of the Botanical Garden of MENDEL, the wild hillside Planýrka and Lužánky Park. Thanks to the clay mass of the stands and the fact that the last official match was played at the stadium in 2001, nature is beginning to take over. It is therefore possible to leave the stadium to continue to create specific conditions for different plant species, but at the same time to use the potential of the standing reinforced concrete structure in its southern part and hand it over to the student association? Finding a suitable solution for this situation and avoiding the gentrification of other urban spaces was my goal in of this thesis.
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Football Recycling
Procházková, Tereza ; Sládeček, Svatopluk (referee) ; Sedlák, Jaroslav (advisor)
The human mind and body are designed to be in nature, and stress is a natural means of ensuring survival. But how to deal with the stress caused by the Internet environment, social media and modern technology? How to find a balance between the real world and life in the online space? Restart attempts to answer these questions. It is a project of an offline centre that offers ideal conditions for regeneration of body and soul, providing incentives to restore a balanced lifestyle and rediscover life energy.
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Football Recycling
Longauerová, Romana ; Sládeček, Svatopluk (referee) ; Sedlák, Jaroslav (advisor)
The final work responds to the global warming trend in the form of a park zone with edible vegetation. This serves as a food source for the residents and also supports the species biodiversity near the city centre. The design makes use of natural resources and creates an efficient rainwater harvesting system from the adjacent area surrounding the site. The heart of the site becomes the former football stadium building, which is used as a community garden and for educational purposes in conjunction with agriculture and nature.
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